Nail straightening machine



March 4, 1947. l G HULBURT 2,416,832

' NAILLSTRAIGHTENING MACHINE Filed may 25, 1945 2 sheets-sheet 2 l.INVENTOR Georlge D. Har-bartv Patented Mar. 4, 1947 NAIL STRAIGHTENINGMACHINE George Delbert Hulburt, Los Angelesyialifj., as-

signor to Twentieth Century- Fox FilmCorpo-k ration, Los Angeles,Calif., a.Y corporation of New York Application May 25, 1943, Serial No.488,365v

l This invention deals with a machine for straightening nails. i

The machine to be described and claimed ,hereinafter has been designedfor the purpose of salvaging nails. It is to be understood that thenails to be straightened by the machine must first be extracted and thenfed to the machine in the manner to be later explained.n VThe machinestraightens the nails in a single operation and has been found to givesatisfactory results on nails bent almost to an angle of ninety degrees.In practice, the nails are straightened cold.

In its preferred form the apparatus consists of arotating, circulartable carrying V-shaped slots or dies adapted to receive the crookednails and bring them under a reciprocating shoe which is synchronizedwith the movement of the table to engage the nails in the slots andpress them into a more or less straightened condition. A noteworthyfeature of the shoe and die construction is the arrangement of wings orfins extending laterally and downwardly from the side of the shoe toform a V-shaped guide on the bottom of the shoe. These fins work inslots in the die and serve the purpose of forcing extremely crookednails into the bottom of the .V-shaped slot before the straighteningforce is applied. Another feature worthy of mentioning is the fact thatthe shoe and the die are so formed as to force the` nail slightly`beyond the straightened .Position when the shoe has reached the end ofits pressure stroke. This is for the purpose of forcing the material inthe nail to set slightly beyond the straightening point, thus allowingfor any spring-back in the nail. Y

Accordingly, it becomes an object to provide a nail straighteningmachine wherein the nails are placed in a rotating table having nailreceiving slots therein and a reciprocating plunger having a. shoe onthe end thereof is adapted to enter said slots and press the nails intoa more or less straightened condition.

Another object of this invention is to provide a nail straighteningmachine wherein nails may be straightened by pressing them into aV-shaped die by means of a V-shaped shoe adapted to iit said die andwherein the shoe has laterallns arranged to form a V-shaped guideextending beyond the bottom pressure point on the shoe.

A further object of the invention is to provide a machine for thepurpose described, charac- Y terized by simplicity, durability,inexpensiveness,

and one which may be operated by unskilled labor. e

' 2 claims. (01.153-48) Other objects and advantages will becomeapparent asthe description proceeds in conjunction with the drawings inwhich: l i

Figure. 1 'is a side elevation partly in sectio of the complete machine;

Figure 2 is an end elevation partly in section of the same; Y,

Figure 3 is a side elevation of part of the super structure; f

Figurevfl is a top plan view of the machine;l Figure 5 is an enlargedfragmentary V'view of .the die showing crooked nails and straightenednails in place; l

Figure 6 is an enlarged vfragmentary viewl of the die and the shoe; f lFigure 7 is a view ofthe shoe taken at -right angles to Figure 6;

Figure 8 is an enlarged fragmentary view taken in the direction of thearrow' ony Figure 4; and Figure 9 is a magnified sectional view of theshoe and die showing them in place withsa nailv in a straightenedposition.

Briefly stated, the invention comprises a rotating table generallydesignated kII and a reciprocating shoe generally designated I2. Thetable II carries a plurality of dies, or V-shaped slots designated I3,which are a part ofthe Ytable and adapted to be rotated therewith and bymeans to be later described, synchronized with the movement of the shoeI2. The table` II is suitably supported upon rollers I4, which are inturn carlried upon a frame generally designated I5 and is journaled inthe middle through bearings I6 and I I adapted to rotatably receive ashaft I8 xed to the center of the table. This structure will be seentoprovide a rotatable support for the table II and at thesaine-time'furnish sufcient supporting means so that enough pressure canbe brought to bear on the table to straighten the nails. No detailedconstruction of the frame will be given,v since it may take avariety offorms such as a fabricated frame or a cast frame, either of which willbe` suitable for the purpose.

It will be observed, however, that oneend of the frame extends above thetable II and is provided with a crossbar I9. suitably vmounted on thecrossbar I9 is a mechanism generally designai-,ed 20 which is for thepurpose of reciprocating the shoe I2. As shown, this mechanism comprisesa boxlike casing 2| into which is reciprocably tted a cage 22. In thecage 22 there is a block 23 which is adapted to reciprocate therein. Theblock 23 in turn is mounted upon a pin 24, which pin is eccentricallymounted upon a disk 25, the disk 25 in turnbeing xed to ashaftf26 tablehaving a plurality of dies therein adapted to receive bent nails havingtheir heads and pointed ends projecting out of the dies, a shoe adaptedto reciprocate into and out of said dies, means operable by the movementof said shoe to intermittently rotate said table so that said shoe maybringr pressure to bear upon nails in successive dies in said table, axed sloping member adapted to engage the heads of said nails anddislodge them from the bottom of said dies, and a striking memberoperable kby the movement of said table to strike said pointed ends anddrive the nails out of the dies.

GEORGE DELBERT HULBURT.

REFERENCES CITED The following references are of record in the le ofthis patent:

Number Number 6 UNITED STATES PATENTS Name Date Glenn July 1'7, 1906Glenn Mar. 17, 1908 Kellogg Mar. 8, 1927 Fontaine Nov. 10, 1885 lZ/)odgeJune 22, 1853 FOREIGN PATENTS Country Date German (Schulze) Feb. 28,1934 Swiss (Hartmann) June 2, 1919 Swiss Nov. 1, 1920

